It looks like some folks have found a way to add custom ringtones to your iPhone by following some steps and using a couple programs called jailbreak and iPhoneInterface. Currently the steps only work for those that are using Intel Mac’s but from the description it probably won’t be long until someone makes an interface to broaden the reach.

The instructions are listed over at HackiPhone and involves a lengthy 23 step process. The steps involve backing up and restoring your iPhone from iTunes and they have a few warnings before you start that …